Abstract Riboflavin. or vitamin B2. is an essential nutrient that serves as a precursor to flavin adenine dinucleotide (FAD) and flavin mononucleotide (FMN). The binding of the FAD and/or FMN cofactors to flavoproteins is critical for regulating their assembly and activity. https://safeersappliancers.shop/product-category/bosch-dib091k50b-touch-control-90cm-island-cooker-hood-stainless-steel/